Fires are threatening homes in Sydney's west as temperatures soar past 30 degrees.
A large grass fire could threaten homes in Sydney's west as the temperature soars past 30 degrees, firefighters say.
Fire crews are working to contain the blaze that broke out in Tickner Road in Castlereagh and was burning towards Devlin Road on Tuesday.
A second grass fire is also threatening a number of homes near Richmond and Bennett roads in Windsor. The fire has crossed Garfield Road and is now burning through Windsor Downs Nature Reserve.
The NSW Rural Fire Service has issued an emergency warning as strong northerly winds carried the fire towards George Street and Bligh Park, according to the RFS website.
An emergency telephone alert has been sent to phones in the area and people have been asked not to drive in smoky conditions.
RFS Deputy Commissioner Rob Rogers said there were 40 fires burning across NSW that had not been contained.
''Fire behaviour very erratic. People need to keep monitoring situation rapidly changing,'' he posted on Twitter about 1.30pm.null
The Rural Fire Service has now issued an emergency warning for another bushfire burning in the Blue Mountains area around Hawkesbury Road at Winmalee.
There are currently unconfirmed reports of property losses in that area, the RFS says.
Several fires have now flared up in Sydney's west. Here is a map that shows the last reported location of the biggest blazes.
View Bushfires in a larger mapnull
There are now more than 50 bushfires burning across NSW.
Three in Sydney's west have prompted emergency warnings to be issued - the Blue Mountains fire, the Castlereagh fire and grass fire burning around Richmond Road at Windsor.
A fourth is burning in the area of Grange Avenue and Marsden Park near Blacktown. Residents in that area are being told to protect themselves from the radiant heat.
The bushfires are causing traffic problems in some areas of western Sydney.
The NSW Ambulance Service says smoke has caused a collission on Castlereagh Road at Castlereagh.
Motorists should also be aware of:
BLIGH PARK: Motorists are advised to avoid Blacktown Road at Bligh Park near Richmond due to a grass fire.
Blacktown Road is closed in both directions between George Street and Bourke Street.
Motorists are being diverted onto Hawkesbury Valley Way and Richmond Road but motorists are urged to stay away from the area altogether.
Jocelyn Anderson said shops in Windsor were closing and the roads were clogged as people sought to leave the area.
"People were heading east, away from the fire," Ms Anderson, who lives near Windsor, said. "We got caught in very heavy traffic."
"Horrendous winds, incredibly dry and hot and scary," were the conditions around 2pm, she said.
Trains were still taking passengers towards the city from Windsor but the service to Richmond had stopped, Ms Anderson said.
The fires are also causing power outages in surrounding areas.
Students at the University of Western Sydney's Hawkesbury campus have been sent home for the day.
UWS Hawkesbury campus has been closed this afternoon due to widespread power outage caused by fires in the area. Other campuses remain open. — UWS (@UWSNews) September 10, 2013
The Rural Fire Service has confirmed one home is alight at Winmalee in the Blue Mountains.
The Premier, Barry O'Farrell, has just told NSW Parliament that two firefighters have also been injured fighting that blaze.
Rural Fire Service Deputy Commissioner Rob Rogers says there are now 45 fires burning out of control across NSW with the biggest concern those blazes in western Sydney.
He has told ABC TV there are now unconfirmed reports of property loss in the Marsden Park fire near Blacktown.
One home is alight at Winmalee. Mr Rogers says there are unconfirmed reports of property lost in the Marsden Park fire near Blacktown.
There are more than 800 firefighters, 200 fire trucks and "numerous helicopters" currently working across the state to bring these blazes under control, he said.
The NSW Rural Fire Service (NSWRFS) major fire updates page has the latest information for what residents living near major blazes.
Seven firefighters have now received treatment while trying to contain the Winmalee bushfire in the Blue Mountains.
That fire has now crossed Hawkesbury Road and is burning under strong northerly winds. One property has been destroyed.
What's sparked such intense bushfires only days into spring?
Adding to the many records to fall this year, Sydney had both its warmest night and hottest day so early in spring.
Temperatures remained above 20 degrees overnight while the maximum of 31.6 degrees was a new early-season record for the city, said David Jones, head of climate monitoring at the Bureau of Meteorology.
Combined with that has been Tuesday's winds.
Simon Louis, from the Bureau of Meteorology said winds in Sydney's west were averaging between 35-45 kilometres per hour, with gusts up to 70 km/h.
Over the next few hours the bureau is predicting a change in overall wind direction, which is likely to affect the course of the fire, from west-north westerly winds towards south westerly.nullnullnull